Also, any one that has sternal involvement is at risk for cardiac tamponade and myocardial contusions. This scenario sound more like an acute abdomen, but it's a good thing to remember. If you suspect any cardiac involvement, a 2D echo, EKG is a great thing to get! A myocardial contusion can lead to fatal arrhythmias. The steering wheel can be just as deadly as the other car in the accident!
And when you start that other IV, make sure it's a large bore. The bigger the better on trauma pts. You may need to dump huge amounts of blood.